[en] The present study aimed to characterise the bacterial, fungal and parasite gut community of the invasive bee Megachile sculpturalis sampled from native (Japan) and invaded (USA and France) regions via 16S rRNA and ITS2 amplicon sequencing and PCR detection of bee microparasites. The bacterial and fungal gut microbiota communities in bees from invaded regions were highly similar and differed strongly from those obtained in Japan. Core amplicon sequence variants (ASVs) within each population represented environmental micro-organisms commonly present in bee-associated niches that likely provide beneficial functions to their host. Although the overall bacterial and fungal communities of the invasive M. sculpturalis in France and the co-foraging native bees Anthidium florentinum and Halictus scabiosae, were significantly different, five out of eight core ASVs were shared suggesting common environmental sources and potential transmission. None of the 46 M. sculpturalis bees analysed harboured known bee pathogens, while microparasite infections were common in A. florentinum, and rare in H. scabiosae. A common shift in the gut microbiota of M. sculpturalis in invaded regions as a response to changed environmental conditions, or a founder effect coupled to population re-establishment in the invaded regions may explain the observed microbial community profiles and the absence of parasites. While the role of pathogen pressure in shaping biological invasions is still debated, the absence of natural enemies may contribute to the invasion success of M. sculpturalis.
Disciplines :
Agriculture & agronomy Entomology & pest control
Author, co-author :
Tuerlings, Tina ; Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
Hettiarachchi, Amanda ; Laboratory of Microbiology, Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium
Joossens, Marie; Laboratory of Microbiology, Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium
Geslin, Benoît; Aix Marseille Univ, Avignon Univ, CNRS, IRD, IMBE, Marseille, France ; Université de Rennes (UNIR), UMR 6553 ECOBIO, CNRS, Rennes, France
Vereecken, Nicolas J; Agroecology Lab, Université Libre de Bruxelles, Brussels, Belgium
MICHEZ, Denis ; Université de Mons - UMONS > Faculté des Sciences > Service de Zoologie
Smagghe, Guy ; Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
Vandamme, Peter ; Laboratory of Microbiology, Department of Biochemistry and Microbiology, Faculty of Sciences, Ghent University, Ghent, Belgium
Language :
English
Title :
Microbiota and pathogens in an invasive bee: Megachile sculpturalis from native and invaded regions.
Fonds Wetenschappelijk Onderzoek F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Funding text :
This work was supported by the FWO and F.R.S.‐FNRS joint program Excellence of Science (EOS) for the project ‘Climate change and its effects on pollination services’ (project number 3094785).
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